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Chemistry

Write balanced chemical equations for the following :

(i) Reaction between 1, 2 – dibromoethane and alcoholic potassium hydroxide.

(ii) Monochloro ethane is hydrolysed with aqueous KOH.

(iii) A mixture of sodalime and sodium acetate is heated.

(iv) Ethanol under high pressure and low temperature is treated with acidified potassium dichromate.

(v) Water is added to calcium carbide.

(vi) Ethanol reacts with sodium at room temperature.

Organic Chemistry

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Answer

(i) Reaction between 1, 2 – dibromoethane and alcoholic potassium hydroxide:

Write balanced chemical equation for the reaction between 1, 2 – dibromoethane and alcoholic potassium hydroxide. Organic Chemistry, Simplified Chemistry Dalal Solutions ICSE Class 10

(ii) Monochloro ethane is hydrolysed with aqueous KOH:

C2H5-Cl Chloroethane [ethyl chloride]+KOH [aq.]boilC2H5-OH Ethanol [ethyl alcohol]+KCl\underset{\text{ Chloroethane [ethyl chloride]}}{\text{C}2\text{H}5\text{-Cl}} + \text{KOH [aq.]} \xrightarrow{\text{boil}} \underset{\text{ Ethanol [ethyl alcohol]} }{\text{C}2\text{H}5\text{-OH}} + \text{KCl}

(iii) A mixture of sodalime and sodium acetate is heated:

CH3COONasodium acetate+NaOHsodalimeCaOΔCH4methane+Na2CO3\underset{\text{sodium acetate}}{\text{CH}3\text{COONa}} + \underset{\text{sodalime}}{\text{NaOH}} \underset{\Delta}{\xrightarrow{\text{CaO}}} \underset{\text{methane}}{\text{CH}4} + \text{Na}2\text{CO}3

(iv) Ethanol under high pressure and low temperature is treated with acidified potassium dichromate:

C2H5OH ethanol[ethyl alcohol]K2Cr2O7[O]CH3CHOethanal [acetaldehyde] K2Cr2O7[O]CH3COOHethanoic acid[acetic acid]\underset{ \text{ ethanol[ethyl alcohol]}}{\text{C}2\text{H}5\text{OH}} \xrightarrow[\text{K}2\text{Cr}2\text{O}7]{\text{[O]}} \underset{\text{ethanal [acetaldehyde] }}{\text{CH}3\text{CHO}} \xrightarrow[\text{K}2\text{Cr}2\text{O}7]{\text{[O]}} \underset{ \text{ethanoic acid[acetic acid]} }{\text{CH}3\text{COOH}}

(v) Water is added to calcium carbide:

CaC2calcium carbide+2H2OwaterC2H2ethyne [acetylene]+Ca(OH)2\underset{\text{calcium carbide}}{\text{CaC}2} + \underset{\text{water}}{2\text{H}2\text{O}} \longrightarrow \underset{\text{ethyne [acetylene]}}{\text{C}2\text{H}2} + \text{Ca(OH)}_2

(vi) Ethanol reacts with sodium at room temperature:

2C2H5OH ethanol+2Na2C2H5ONa sodium ethoxide+H2\underset{\text{ ethanol} }{2\text{C}2\text{H}5\text{OH}} + 2\text{Na} \longrightarrow \underset{\text{ sodium ethoxide} }{2\text{C}2\text{H}5\text{ONa}} + \text{H}_2

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